Improvement in paper-bag machines



4 Sheet s-Sheet I.

E- DAVIDSON. P ag-Mac;1ine

WITNESSES: INVFNTOR:

W a Qty/i ATTORNEYS.

N- PETERS PHOTO-LITHOGRAPHER. WASHINGTON n c 4 Sheets-Sheet 2. 0. E.DAVIDSON.

Paper-Bag Machine.

No. 219,920. Patented Sept. 23, 1879.

WITNESSES: fa

ATTORNEYS.

NJETERS, FHOTO-LFIHOGRAPHER WASHINGTON u c 4 Sheets-Sheet 3.

0. E. DAVIDSON.

WITNESSES: k G k INVENTOR: h Q (ff fiam'aaw ATTORNEYS.

4sneets-sheet4. 0. RDAVIDSON. Paper-Bag Machine.

No. 219,920. Patented se t. 23,1979.

WITNESSESL INVENTQR:

ATTORNEYS.

UNITED'STATES PATENT OFFICE.

OTIS E. DAVIDSON, OF GLARKSVILLE, TENNESSEE.

IMPROVEMENT lN- PAPER-BAG MACHINES.

Specification forming part of Letters Patent No. 219,920, datedSeptember 23, 1879; application filed June 6, 1879.

To all, whom it may concern:

Be it known that I, OrIs EVERETT DAVID- soN, of Olarksville, in thecounty of Montgomery and State of Tennessee, have invented a new andImproved Paper-Bag Machine; and I do hereby declare that the followingis'a full, clear, and exact description of the same.

This invention is an improvement in the class of paper-bag machinesadapted to form satchel-bottomed bags having a single lengthwise seam orlap.

The invention consists in novel mechanism for feeding and pasting, andalso creasing, the continuous web of paper, and for cutting 01f blankstherefrom, and folding, pasting, and pressing the latter, anddischarging them from the machine as completed bags.

In the accompanying drawings, forming part of this specification, Figurel' is a plan view of the machine. Fig. 2 is a longitudinal verticalsection of the machine on line aa; of Fig. 1. Fig. 3 is a verticalcross-section on line 1 y, Fig. 1. Fig. 4. is a plan view of the pivotedor tilting table section detached. Fig. dis a perspective view of aside-folding flap and end-foldingflap attached thereto. Fig. 6 is adetail plan; and Figs. 7, 8,9,10, 11, detail sections in a verticalplane, showing the folding mechanism in different positions which itassumes in practical operation. Figs. 12 and 13 are side views of bagpartly completed and completed, respectively.

The continuous paper strip or sheet (drawn from a web or roll, notshown) from which the bag-blanks are cut, passes between an idle roll,B, and positive feed-wheels G 0 upon a table, D. The forward or innerend, E, of said table is a separate section, and pivoted in the sidebars of the frame F. Two parallel transverse grooves, a, and shortdiagonal lines I), crossing these at right angles to each other, areformed in the face of this section E, Fig. 1, and corresponding ribs to,Fig. 2, are attached to the under side of the cross-bar G, beneath whichthe sheet passes to the bagforming mechanism proper, so that when thesaid pivoted section E is tilted, as will be presently described, thesheet will be pressed up against the said cross-bar, and creased, asrequired, to adapt it for subsequent folding.

The feed wheels or disks 0 G project up through slots in table D, so asto come in frictional contact with the sheet when they are elevated androtated, as hereinafter described, for intermittently feeding andpasting the sheet.

The left-hand disk, 0, rotates in a pastetrough, H, and thus appliespaste to the edge of the sheet at the same time that it assists infeeding it forward. The left-hand side of the table D and tiltingsection E is provided with a groove, d, to prevent removal of'the pasteby contact of the sheet with the table and section as the sheetadvances.

The V-shaped cutter L acts in alternation with the feed-wheel O C, sothat it rises and severs a blank from the continuous sheet at the momentsaid wheels cease to feed the latter. The shank of the cutter L ispivoted to the longer arm of a horizontal lever, M, fulcrumed at N, andthe shaft 0 of feed and paste wheels 0 G has its bearings in the shorterparallel arms of said lever. Thus the oscillation of the lever M causeswheels 0 O to rise and come in contact with the sheet, and the cutter Lis simultaneously lowered, and, vice versa, when the cutter rises thewheels are lowered.

The lever is operated by the cam P, fixed on the middle of driving-shaftQ, so that the lever is vibrated at each rotation of the latter.

The two positions of the feed-wheels and cutter are shown in Fig. 2,full anddotted lines. The feeding and pasting wheels 0 O are rotatedcontinuously by a band, B, which runs on pulleys S fixed ondriving-shaft Q.

The knife or cutter L is held against the fixed inclined knife-plate T,attached to crossbar G, by means of a plate-spring, U, whose free endbears on the lever M, as shown in Fig. 2, so that when the cutter isforced upward it will neatly sever a bag-blank from the sheet.

The operation of the lever M, as above described, also causes thesection Eto tilt when the cutter L rises, so that the sheetis creasedsimultaneously with the severing of the bagblank. This action of thesection E is-efiected by contact of its pendent stud. V with the longerarm of lever M. Said stud is screwthreaded, and works in a corresponding socket, so that it may be adjusted to varythe pressure of the lever onthe section E, and thereby cause the sheet to be creased more or lessdeeply.

I will now proceed to describe the mechanism by which the blanks,successively severed from the sheet by the cutter L, are folded, pastedat the end, and gradually formed into complete bags, and the latterdischarged from the machine.

As a preliminary to a detailed description, I will state that after thesheet has passed beneath the fixed knife-plate T it enters a narrowspace between the horizontal foldingtable W and the former X, which issupported parallel thereto.

The folders or flaps A A are hinged somewhat loosely at the sides of thetable W, and are thrown over upon the former X, to fold in and lap thesides of the bag-blank, by means of arms B, having their upper endsnotched to engage with flanged mutilated gears or pinions D on the flapsA and A. These arms B stand vertical, and are attached to the ends of atransverse bar, I1, which forms part of the lever M. Hence the arms Bwill rise and operate the folders A A simultaneously with the action ofthe cutter L; and since the form of the latter enables it to begin tosever the blank at the edges, and to cut thence inward toward itsmiddle, it will be seen that such form and action of the cutter haveapeculiarlyimportant relation to the time and manner of operation of thefolders A A, so that the latter turn the sides of the blanks inwardwhile they (the blanks) are being divided from the sheet.

The folder A acts first, or slightly in advance of the other one, A, sothat the pasted edge of the blank is folded 011 the former X just beforethe other edge. The folder A then presses the lapped edges together andcauses them to adhere.

Just as the arms B begin to rise to operate the folders A A, the pastersE are caused to rise and apply paste at different points on the end andunder side of the blank. Said pasters consist of arms having plates orcups attached to their free ends, which rest in the paste-trough F. Thepasters are attached to a crank-rod, G, encircled by a spiral spring, H.The crank or bent arm of the rod G is depressed at each revolution ofdriving-shaft Q by a pivoted lever, l, which comes in contact with anarm, 1', on the large gear K, mounted on the driving-shaft Q. Thus thewheel K raises the pasters E out of the trough F, and the spring Hthrows them down again until the wheel K has made another revolution.

The tongue L is a curved plate fixed on the innerend of a sprin g-encircled rotatablerod, M, having its bearings in a right-angular arm, N.This arm is rigidly connected with a pinion, O, which is mounted on astud that projects from the side of the frame F. A slotted slidingrack-bar, I, engages said pinion O, and is itself operated by a cam, R,on the drivingshaft Q. Thus the arm N, the rod M, and the tongue Lcarried by it are thrown forward once in each rotation of thedriving-shaft, and the tongue thereby caused to open the end of thepaper tube. The tongue L raises the spring-flap S along with the edge ofthe paper tube, Fig. 6, and the notched blade or presserfoot T is thrownforward and folds inward and flattens the sides of the tube, so that itassumes the appearance shown in said Fig. 6.

The movement or operation of the tongue L progresses until the tappet kof rod M, Fig. 11, strikes upon the stud l, fixed vertically in theframe F, which causes the tongue to release the flap S, so that thelatter turns the upper corner of the tube down and holds it while thefoot T withdraws.

I have omitted to state that the flat fingers U act simultaneously withthe blade or presserfoot T, and press the folded end of the tube into atransverse groove in the end of the folding-table \V, thus duly creasingthe tube preparatory to the final fold.

The blade T is hinged, and the fingers U are fixed on the arms of anoscillating rockshaft, V, whose bent arm or crank is connected with theangular arm N by a rod, W. Thus the blade T and fingers N are operated,like the tongue L, by the'rack-bar P, pinion O, and cam R.

The blade T has a spring attachment, X, which allows it to yield as itpresses, as above described, upon the folded end of the paper tube.

As the blade T and fingers U rise, the plates Y slide in over the end ofthe tube. These plates are attached to rods Z, which are hinged to armsA, that are rigidly attached to a rock-shaft.

A spiral spring, 0, encircles one end of the shaft, and holds the arms Athrown bacl? until the rotation of the large spur-gear K brings itstappet or wing m into contact with the bent end of the arm D of theshaft, thus depressing said arm and turning the shaft about a quarter ofa revolution, which carries the plates Y forward, as before described.So soon as this has been done, the former X is moved onward.

The former is slotted, and slides on a fixed plate, E. It is operated bya crank, F, having its hearings on cross-bar G. The former X isconnected to the short arm of the crank F, and the longer arm of thelatter is pendent in such relation to the gear K that when the latterrotates its cam or projection n will act on the arm and move the former.

When the former thus slides onward it necessarily carries the tube orpartly-com pleted bag with it, and when it reaches the limit of itsmovement the blades Y begin their receding movement, and in doing soengage the folded portion of the bag-tube and draw it oh" the former Xand beneath the flap G. The latter consists of two parts-a hingedspringplate, 11, and a plate, 1', which is rigidly attached to across-shaft, H, or rod, which is encircled by a spiral spring, I, andprovided with atappet, s. v 7

When the plates Y slide forward, Fig. 10, an inclined or beveled lug, t,on the bar Z raises the tappet s, andthereby rotates the rod H a part ofa revolution, thus throwing the plate G downward, as shown in Fig. 8,against the tension of the spring I, so that when the catch-plates Yrecede, as before described, the lower point, g, of the tube end willslide upon the plate G and be turned partly backward, Fig. 8. When thishas been accomplished the plate G rises in time to allow the tube topass under it, when the pressure of the hinged spring-flap 1) upon thesaid lower corner of the tube turns it completely backward, and holds itmomentarily fiat upon the bottom of the now completed bag. The bag thenpasses between the finishing-rolls Li L, by which it is flattened aridsmoothed, and is finally discharged upon the inclined table M, whence itpasses into any suitable receptacle. (Not shown.) i

The roll L is an idler; but the lower roll, L, receives positive motionby the belt N from the pulley S on the driving-shaft Q.

It will be seen from the foregoing description that the pasters E,tongue L, presserfoot T, and fingers U, catch-plates Y, former X, andfinal-fold flap G are all operated or brought into positive action bythe cams of spur-gear K acting on the several tappets, and that all ofsaid devices are retracted or drawn back to their original quiescentposition by means of springs.

The operation of the machine may be briefly recapitulated as follows:The paper sheet is fed over the table D, and at the same time pasted onone edge by wheels O O. This is efiected during a part of the revolutionof the driving-shaft Q. As the latter completes its revolution the cam Praises the inner or longer arm of lever M, and thereby tilts the sectionE and creases the sheet, while the cutter L simultaneously severs theportion of the sheet which has passed beyond the cross-bar G. Thissevered portion constitutes the bag-blank, which is formed first into atube, X, and next into a bag, Y, while the wheels 0 O are again operatedto paste and feed the sheet A, as before.

The first steps of the bag-forming operation are the application ofpaste to the end of the blank by arms E, and the folding inward of thesides of the blank by flaps A A. Both these devices, E A A, operatetogether with the cutter L. The flaps A A form the blank into a tube, X,Fig. 6. The tongue L then opens the creased end of the' tube, and thenotched blade or presser-foot T immediately follows and carries thesides of the end of the tube inward and presses them flat upon theformerX. Thefingers U at the same timepress the folded-in sides of thetube into a groove formed in the rear end of the folding-table W, andthereby crease the same preparatory to the final fold. The tongue L thenreleases the spring flap or folder S, which-is hinged to the end ofside-folder A, and allows it to turn over and press down the firstcorner or point, f, of the tube end, Fig. 4:. Then the blade L slips outfrom under the flap S, and the sliding plates Y pass in over the bottomof the tube or partially-completed bag X, and the former X slides back,carrying the tube with it, so that as the plates Y recede they will engage the first fold, f, and draw the tube with them, first against (Fig.8) and then beneath (Fig. 9) the hinged flap or plate G, by which thelower corner, g, of the tube is folded upward and pressed flat upon thesquare bottom of the tube, thus completing the bag X in the form shownin Fig. 13. The latter is then passed on between the finishing-rolls L Land discharged by sliding over table M.

What I claim is- 1. In a paper-bag machine, the combination,

substantially as shown and described, of the' vertically-adjustable studwith the tilting table section, to which it is attached, the crossbarlocated above the tilting section, and the vibrating lever, for thepurpose specified.

3. In a paper-bag machine, the pasting and feeding wheels, and thehorizontally-pivoted section, the cutter, and the vibrating lever whichoperates said parts, in combination with the slotted table and fixedbar, as shown and described, whereby the said section and cutter go downand remain inactive while the wheels operate, and the latter go down andremain inactive while the section and cutter rise to arrest, crease,clamp, and cut the paper, as specified.

4. In a paper-bag machine, the combination, substantially as shown anddescribed, with the fixed bar or knife, of the cutter and vibratinglever, to which it is hinged, the spring attached to the shank of thecutter, and its free end bearing upon said lever, whereby the cutter ispressed against the fixed bar in any portion of its movement.

5. In a paper-bag machine, the vibrating pasters E, consisting of armshavingcups or disks attached to their ends, and the rod or shaft G,having a bent arm, by which it is rocked, and the paste-trough F, inwhich the pasters are arranged to rise and fall, as and for the purposespecified.

6. In a paper-bag machine, the combination of the tongue or device foropening the end of the tube, the side-folders, and the spring-flap,hinged to one of the latter, as shown and described.

7 In a paper-bag machine, the combination, substantially as shown anddescribed, of the catch-plates, arranged to slide over the folded end ofthe tube and drawthe latter backward, and the flap for turning up andpressing upon the lower corner of the tube-bottom, and therebycompleting the formation of the bag.

8. In apaper-bag machine, the combination of the catch-plates and thehinged spring-flap of the plate for pressing upon the lower corner ofthe tubehottom as the tube passes beneath it, as specified.

9. In a paper-hag machine, the combination of the cam It, raek-bar P,pinion O, angular arm N, tongue L, and aspring encircling the rod M, towhich the tongue is attached, as shown and described.

10. In a paper-bag machine, the combination of the connecting-rod 'W,.angular arm N,

OTIS EVERETT DAVIDSON.

Witnesses:

R. F. KEESEE, H. C. CURRY.

